Housing for combined sound and motion-picture projectors



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MALICKSON 2,041,845.

' "QRGOMBINED SOUND AND MOTION PICTURE PROJECTORS- Filed Sept. 29, 1954 2 Sheets-Sheet 1 INVENTOR.

Phi/4'0 6T Mafl'aksan By W. ATTORNEY.

May 26, 1936. P. S..MALICKSON HOUSING FOR COMBINED SOUND AND MOTION PICTURE PROJECTORS 2 sheds-sheet 2 Filed Sept. 29, 1934 I: INVENTOR. I P/zi/q'a 5. Mafia/4'50 I By W I ATTORNEY.

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Eatenteol May 26, W35

parish eras star HOUSING FOR COMBINED SOUND 1 Claim.

My invention relates to photo-acoustic cinematographic unit, and relates more particularly to the housing of the unit.

It is an object of my invention to produce a housing for a combined picture and sound projector that lends itself readily to transportation by hand, contains a minimum of parts, and the volume of which is reduced to a minimum.

Another object of my invention is to electrically shield the entire unit by a metallic casing to prevent the transmission of feedback noises or electrical disturbances to the sound reproducing circuits located outside of the casing which noises or disturbances may come from the power circults operating the various mechanisms and the light source in the casing.

Another object of my invention is to provide a substantially fire-proof housing.

Another object of my invention is to make a sturdy housing that is substantially sound-proof and vibrationless.

Another object of my invention is to equip the casing with means for adjusting its vertical position in a stable manner.

A still further object of my invention is to construct a housing that is symmetrically proportioned in order to be pleasing in appearance.

Other objects of my invention are to provide an improved device of the character described, which is easily and economically produced, that is sturdy in construction, and which has a maximum efficiency and accuracy in operation. With the above and related objects in view, my invention consists in the following details of construction and combination of parts, as will be more fully understood from the following description, when read in conjunction with the accome panying drawings; in which:

Fig. l is an assembled perspective view of the housing and the reel supporting arms.

2 is a side elevational view of the fixed side plate of the casing.

E- is a sectional view taken on the line 3--3 of Fig. 2.

Fig. is a perspective view or the elevating bracket.

Fig. 5 is a side elevational view of the movable door for the housing.

Fig. 6 is a perspective view of the movable door.

Fig. '7 is a sectional view taken on the line l'l of Fig. 6; showing its cooperating wall in dotted lines.

Fig. 8 is a sectional view taken on the line 8-8 of Fig. 6, showing its cooperating wall in dotted lines.

Fig. 9 is a side elevatlonal view of the door side of the housing.

Fig. 10 is a rear elevational view of the housing. Referring in detail to the drawings, in Fig. 1, 9 and I is shown a casing, generally designated as A, and comprised of metal, such as cast aluminum. Since the projection mechanism, described in my copending patent application Serial No. 481 filed January 5, 1935, is of considerable weight the housing must possess the requisite strength and, also, must withstand the strain imposed without the various elements moving from their original position. The housing A is comprised of a substantially rectangular base ID of relatively thin metal. integrally formed with the base ID at its transverse edges I2, I 4 are vertically extending parallel front and back walls l6, l8 respectively.

From the upper edge iii of the front wall is an angularly extending wall 28 which is joined at its edge 22 by a ceiling 25. The ceiling or top wall 24! extends parallel to and over the base l0, and the end 28 of the ceiling is joined to the rear wall l8 by an angularly extending wall 28.

i To form a substantially enclosed chamber for the projecting apparatus a side wall 3t, Figs. 2 and 3, is provided to close one side of the chamber. The side wall or side plate, generally designated as B, is comprised of a substantially thin fiat plate, the plate is substantially rectangular 30 as viewed from the side, except that its upper corners are diagonally cut; the plate is so formed in order that the plate will join the side edges of the base, the ceiling, the side and front walls, and angularly disposed walls 20 and 28. A continuous bead 32 is mounted upon the interiorly positioned portion of the side plate or side wall 3%); and the head is located close. to the peripheral edges of the side plate. The bead 32 is adapted to extend interiorly of the housing and the transversely extending members of the housing are adapted to be limited in one direction of movement by the bead. As illustrated in Fig. 3 the ceiling 2t and the base Hi shown in dotted lines are adapted to engage the bead. The bead pro-- vents the buckling or folding of the housing when the housing together with its coordinate menu hers is carried. A plurality of openings 34 located between the bead and the outer edge permits the body of bolts to be passed therethrough 5 in order that the plate may be suitably attached in position. A plurality of openings 36 are for air to pass through the side plate into the interior of the housing.

A hinged door, generally designated as 0, pro-- vides the closure for the second side of the chamher. The door C has a main body portion 38 hinged at its vertically extending fold 4G. Folds, hereinafter further described, are formed integrally with and extend perpendicular to the main body portion 38, which is substantially a fat plate. The perpendicularly extended folds embrace a portion of the walls l6. N3, the angularly extending walls 20, 28 and the ceiling 25. Thus, the folds serve as additional braces to prevent the buckling or expanding of various portions of the outer housing.

A hinge 4| is attached to the rear wall l8 and the rear vertically extending fold so that the door swings about a vertically positioned axis.

In order to provide a suitable support and brace to prevent the buckling or the expanding of the various portions of the transverse members of the housing, the folds have their outer ends formed to pass exteriorly and interiorly adjacent the side edges of the various transverse members comprising the housing. The upper horizontally extending fold 52 well shown in Figs. 6 and 8, has its upper surface 43 in the same plane but its lower surfaces 44, 45 are offset from one another, a surface 46 is substantially perpendicular to the surfaces 44, 45 and forms a ledge against which the edge of the ceiling 2d rests. The surface 45 of the fold as viewed in Fig. 8 rests upon the upper surface ceiling 24 so that the surface 45 is exteriorly positioned with respect to the chamber formed by the housing.

The front vertically extending fold 48, well illustrated in Figs. 5, 6, and '7 has its interior surface 49 extending in the same plane and its outer surfaces 59, 5| offset from one another. A surface 52 joins the edges of the surfaces 50, 5i and the surface 52 serves as a ledge against which an edge or" the front wall l6 engages. The surface 5!] is substantially flush with the exterior surface of the front wall H5.

The bottom fold, the rear vertically extending fold an and the angularly disposed folds are constructed similarly to the vertically extending front fold 48.

With the door C in closed. position and the side plate B attached to the housing it will readily be seen that when the handle or grip, generally designated as D, is grasped to carry the casing an upward force is placed upon the ceiling 24. The edge of the ceiling 24 engages the surface 25 of the fold 42, thus preventing a bulging of the top of the casing.

The weight of the mechanism inside the housing is the equivalent of a downwardly extending force upon the base it? of the housing. Such force tends to cause the central portion of the base ill to drop which if unsupported would result in the walls l5 and i8 being drawn together. However, since the interior portion of the folds so and 48 oppose the inward movement of the walls l6 and i8, respectively, it will be readily seen that the only downward movement of the base would result from the elongation of the base itself created by the force imposed thereon. Since the metal used as a base possesses the requisite tensile strength, there is substantially no movement of base. It is, also. to be remembered, at this time that the bend on the side place B is engaged to off-set any tendency of the walls of the casing to converge at their lower extremities: and the bead, also. forms a rest both for the ceiling and the base of the casing in order that the housing will be able to withstand the various strains and stresses which may be imposed thereon.

A rectangular opening 54 having a transparent body therein is suitably positioned in the door C in order that the film passing the film moving mechanism may be viewed by the person operating the projector during the time that the door is closed.

An opening- 56 adjacent the rear portion of the ceiling it enables a hood 58 for a source of light to protrude therethrough.

A slit 60 extends from one side of the ceiling 2t, to a larger opening adjacent the handle D wherein there are a plurality of rollers 62 and 84. The rollers 62 and 64 are under cut on their curved bounding surface adjacent the handle D. The purpose of under-cutting the rollers is to save wear on the film emulsion of the film sound track since the scraping of the sound track will cause undue and extraneous noises to be emitted from the loud speaker.

The supply reel support 66 is detachably mounted upon the upper surface ofthe ceiling 24 adjacent the edge 22 by means of screws 68 and 70 passing through a flange of the support 85. The holding screws are of the type that may be easily removed in order to enable the support 66 to be detached or attached to the housing as the case may be. The support 66 and the rollers 62, 64 are positioned so that film designated as F from a supply reel 72. schematically shown by dotted lines, will pass from the reel past the rollers with a minimum degree of bending.

A circular opening 74 is located on the front wall l6 through which opening rays of light carrying an image may pass.

A horizontally positioned slit 76 extends from an edge of the front wall to an aperture wherein rollers '18, BB are located, the rollers are positioned parallel to one another in a horizontal plane. The film F is guided on the rollers 18, 8D to a film take-up reel, generally designated as G, which reel is schematically shown. Each set of rollers 62, B4, and 78, 80 are in substantially the same vertical plane in order that the film shall move in the same vertical plane. It is to be observed at this time that the slits 60 and I6 enable the easy threading of the film into and from the housing. Also the location of the supply and take-up reels is such that they will not cause 1 undue bending of the film: for it is well known that the film, and the maintenance of the film is expensive and that the machine should have no deleterious effect on the film.

An aperture 82 in the front wall 16 permits the passage of an electrical plug whereby the leads from the photo-electrical cell may be attached to the amplifying circuit and a plug from the power circuit may "be inserted through an aperture 84 to connect it to the exciter lamp. A take-up reel support arm is adjustably mounted on the casing H. The adjustable take-up reel bracket is described in detail in my co-pcnding application, Serial No. 746.088, filed September 29. 1934.

In order to vertically adjust the complete housing I mount a rectangular strip, generally designated as J. upon the central lowermost portion of the front wall IS. The strip has parallel side walls 94A and 96A. and a fron wall wh rein a threaded opening 98 is located.

A movable elevating device. generally desig nat d as K, has :1. main body portion 39 and a. central slot 92 therein. The portion of metal adjacen the rear of the slot 92 is milled so that its parallel vertically extending sides 94 and 86 are complementary to the parallel vertically ex-'- tending sides 94A and 96A of the strip J. The threaded opening 98 in the strip J is adapted to receive and retain an end of the thumb screw I00. The screw I00 is adapted to pass through the slot 92 and retains the elevating device K .securely against the strip J. In operative position, the sides Bl, 94A and 95, 96A are in engagement, thus no tilting of the housing will occur relative to a longitudinally vertically extending plane. The elevating device K has legs I02, HM at each end in order that there will be at least a two-point support at the front end of the housing. By unloosening the thumb screw I00 and moving the elevating device downwardly and then tightening the thumb screw, the front portion of the housing may be elevated in order that the rays of light passing through the aperture 14 may be raised. The front portion of the housing may be lowered by reversing the above procedure. The vertical movement of the front of the housing is limited only by the length of the slot 92.

Upon the bottom of the base Ill adjacent the rear wall I8 is a plurality of legs I06 which legs are preferably comprised of rubber. The legs are positioned so that the housing will remain stable when the elevating device K is either in raised or in lowered position.

Placed adjacent each of the side walls B and C are asbestos boards which deaden extraneous noises.

Mounted upon the front of the door and the front wall of the housing are a plurality of locks, each of which may easily be opened by raising a latching lever. A knob on the door enables the door to be easily opened.

Although my invention has been described in considerable detail, such description is intended to be illustrative rather than limiting since the invention may be variously embodied and the scope of the invention is to be determined as claimed.

I claim as my invention:-

A portable housing for a combined sound and motion picture projector comprising a flat metallic base; front and rear parallel vertically extending walls joining the ends of the base; a flat wall inclined towards the center of the vertically extending central axis of the housing; and a flat ceiling parallel to the base and joining the upper end of each inclined wall; the edges of the complemental base, front and rear walls, the inclined walls and the ceiling joined to form an integral structure; a removable fiat side plate having a bead thereon whereby the inside edges of the walls will abut against the bead in order to support the side edges of the said base, front and rear walls, inclined walls and the base; a pivoted flat side door for the second side of said housing, said side door having a flange laterally extending from its edges, and a fold on the upper horizontal edge of the flange adapted to overlap a portion of the outer surface of the ceiling when the door is closed, and a plurality of folds extending from the bottom and side flanges adapted to overlap the interior portion of said base and side walls; and a handle on the outer portion of the ceiling. 

